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30/ENGINE - WORK ON INDIVIDUAL PARTS
Checking piston/cylinder mounting clearance
Check/measure the cylinder. (
Check/measure the piston. (
The smallest piston/cylinder mounting clearance is the result of the smallest cylinder bore diameter minus the largest piston diam-
eter. The largest piston/cylinder mounting clearance is the result of the largest cylinder bore diameter minus the smallest piston
diameter.
Specification
Piston/cylinder - mounting clearance
Size I
Size II
Wear limit
Checking the oil pumps for wear
Info
The following figures show how to check the oil pumps for wear using the suction pump as an example, but the method applies
to all pumps.
Checking the lubrication system
0 0 3
3
0 0 4
4
3
0 0 3
0 0 9
9
0 0 2
2
0 0 3
3
8
0 0 8
3
0 0 3
0 0 3
3
6
0 0 6
0 0 7
7
3
0 0 3
8
0 0 8
P. 80)
P. 81)
Use feeler gauge
case.
Oil pump
Clearance between external rotor
and engine housing
»
The measured value does not equal the specified value.
200164-10
Use feeler gauge
rotor.
Oil pump
Clearance between external rotor
and internal rotor
»
The measured value does not equal the specified value.
200165-10
Renew the O-rings or seal ring
1
0 0 1
Renew oil filter
Renew the O-rings or shaft seal ring
Clean and check oil screens
0 0 1
1
Thoroughly clean the gear oil drain plug with magnet
4
0 0 4
3
0 0 3
Check oil pump cover
1
0 0 1
grooves.
0 0 5
5
»
If there are grooves:
Check the oil pumps for wear. (
1
0 0 1
Place oil pump shaft
»
If there is run-out:
Check oil pump gears
»
If the oil pump gear is worn:
Check ball
0 0 6
6
wear and scoring.
»
If there is wear or scoring:
200186-01
0.04... 0.082 mm (0.0016... 0.0032 in)
0.043... 0.075 mm (0.0017... 0.003 in)
0.12 mm ( 0.0047 in)
to measure the play between the external rotor and the engine
Change the oil pump and, if necessary, the engine case.
to measure the play between the external rotor and the internal
Change the oil pump.
with every oil change.
with every oil change.
. Replace damaged or worn parts.
and the engine case in the vicinity of the oil pumps for
Change the oil pump cover and, if necessary, the engine case.
P. 82)
on a level surface and check for run-out.
Change the oil pump shaft.
for wear.
Change the oil pump gear.
of the oil pressure regulator valve and its seat in the engine case for
Change the ball and, if necessary, the engine case.
0.2 mm ( 0.01 in)
0.2 mm ( 0.01 in)
with every engine repair.
.
82
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